$ git clone -n https://src.fedoraproject.org/rpms/rt.git /var/lib/mock/f39-build-1537989-36388/root/chroot_tmpdir/scmroot/rt
Cloning into '/var/lib/mock/f39-build-1537989-36388/root/chroot_tmpdir/scmroot/rt'...
$ git fetch origin 3718969770bdffb761bf3e2ccefdc4b5755b3f0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rt
 * [new ref]         3718969770bdffb761bf3e2ccefdc4b5755b3f0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3718969 Enforce BR: perl(DBIx::SearchBuilder) >= 1.77.