$ git clone -n https://src.fedoraproject.org/rpms/MUMPS.git /var/lib/mock/f39-build-1453271-32875/root/chroot_tmpdir/scmroot/MUMPS
Cloning into '/var/lib/mock/f39-build-1453271-32875/root/chroot_tmpdir/scmroot/MUMPS'...
$ git fetch origin 7f4f280b8a749d7ba791fd3bf32d2b8bfe05a34f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/MUMPS
 * [new ref]         7f4f280b8a749d7ba791fd3bf32d2b8bfe05a34f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f4f280 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild