$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Spec.git /var/lib/mock/f39-build-1435180-31974/root/chroot_tmpdir/scmroot/perl-Test-Spec
Cloning into '/var/lib/mock/f39-build-1435180-31974/root/chroot_tmpdir/scmroot/perl-Test-Spec'...
$ git fetch origin 3319633bec133066bf41233c70db539d7202c4ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Spec
 * [new ref]         3319633bec133066bf41233c70db539d7202c4ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3319633 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild