$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Snapshot.git /var/lib/mock/f39-build-1435176-31974/root/chroot_tmpdir/scmroot/perl-Test-Snapshot
Cloning into '/var/lib/mock/f39-build-1435176-31974/root/chroot_tmpdir/scmroot/perl-Test-Snapshot'...
$ git fetch origin 3fd551f798d5fb99524a7b1fa6b03e5967a1dc0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Snapshot
 * [new ref]         3fd551f798d5fb99524a7b1fa6b03e5967a1dc0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3fd551f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild