$ git clone -n https://src.fedoraproject.org/rpms/tftp.git /var/lib/mock/f39-build-1519511-35816/root/chroot_tmpdir/scmroot/tftp
Cloning into '/var/lib/mock/f39-build-1519511-35816/root/chroot_tmpdir/scmroot/tftp'...
$ git fetch origin cb8445a05ba2f800dcba7f252f801fd1e31d9996:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tftp
 * [new ref]         cb8445a05ba2f800dcba7f252f801fd1e31d9996 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb8445a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild