$ git clone -n https://src.fedoraproject.org/rpms/kf5-prison.git /var/lib/mock/f40-build-1892445-25062/root/chroot_tmpdir/scmroot/kf5-prison
Cloning into '/var/lib/mock/f40-build-1892445-25062/root/chroot_tmpdir/scmroot/kf5-prison'...
$ git fetch origin 04c3f078230e48d2eb9b2e0ecf1f82159bd50e2b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-prison
 * [new ref]         04c3f078230e48d2eb9b2e0ecf1f82159bd50e2b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 04c3f07 5.116.0