$ git clone -n https://src.fedoraproject.org/rpms/plexus-build-api.git /var/lib/mock/f41-build-1139278-20898/root/chroot_tmpdir/scmroot/plexus-build-api
Cloning into '/var/lib/mock/f41-build-1139278-20898/root/chroot_tmpdir/scmroot/plexus-build-api'...
$ git fetch origin 8c0a76f1150b95a11a13275f7d985e4a30eaab9a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plexus-build-api
 * [new ref]         8c0a76f1150b95a11a13275f7d985e4a30eaab9a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c0a76f Rebuilt for java-21-openjdk as system jdk