$ git clone -n https://src.fedoraproject.org/rpms/subunit.git /var/lib/mock/f40-build-787505-134782/root/chroot_tmpdir/scmroot/subunit
Cloning into '/var/lib/mock/f40-build-787505-134782/root/chroot_tmpdir/scmroot/subunit'...
$ git fetch origin dc903d5f71f4d53dd295d1493ad5ea9f710eeaaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/subunit
 * [new ref]         dc903d5f71f4d53dd295d1493ad5ea9f710eeaaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc903d5 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild