$ git clone -n https://src.fedoraproject.org/rpms/tmt.git /var/lib/mock/f39-build-1540442-36472/root/chroot_tmpdir/scmroot/tmt
Cloning into '/var/lib/mock/f39-build-1540442-36472/root/chroot_tmpdir/scmroot/tmt'...
$ git fetch origin d2ce4d846b4929bfedf69b870335f3fc4a2942bb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tmt
 * [new ref]         d2ce4d846b4929bfedf69b870335f3fc4a2942bb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2ce4d8 [packit] 1.28.2 upstream release