$ git clone -n https://src.fedoraproject.org/rpms/libXp.git /var/lib/mock/f39-build-1461350-33255/root/chroot_tmpdir/scmroot/libXp
Cloning into '/var/lib/mock/f39-build-1461350-33255/root/chroot_tmpdir/scmroot/libXp'...
$ git fetch origin 56a779cd0a0cdf1b40f8d8e87af5781014592f0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXp
 * [new ref]         56a779cd0a0cdf1b40f8d8e87af5781014592f0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56a779c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild