runtime (Checkout) leg is failing

[am11]

Checkout leg is failing with the following error:

+ git diff -M -C -b --ignore-cr-at-eol --ignore-space-at-eol --exit-code --quiet origin/master -- ':!eng/Version.Details.xml' ':!*.md' ':!LICENSE.TXT' ':!PATENTS.TXT' ':!THIRD-PARTY-NOTICES.TXT' ':!docs/*' ':!src/installer/*' ':!src/mono/*' ':!src/libraries/*' ':!eng/pipelines/installer/*' ':!eng/pipelines/mono/*' ':!eng/pipelines/libraries/*'
fatal: bad revision 'origin/master'

----- Matching files for coreclr -----
+ git diff -M -C -b --ignore-cr-at-eol --ignore-space-at-eol --name-only origin/master -- ':!eng/Version.Details.xml' ':!*.md' ':!LICENSE.TXT' ':!PATENTS.TXT' ':!THIRD-PARTY-NOTICES.TXT' ':!docs/*' ':!src/installer/*' ':!src/mono/*' ':!src/libraries/*' ':!eng/pipelines/installer/*' ':!eng/pipelines/mono/*' ':!eng/pipelines/libraries/*'
fatal: bad revision 'origin/master'

raw logs: https://dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_apis/build/builds/881055/logs/8.

[jkoritzinsky]

Fixed by #44474