$ git clone -n https://src.fedoraproject.org/rpms/perl-Tree-R.git /var/lib/mock/f39-build-1439818-32287/root/chroot_tmpdir/scmroot/perl-Tree-R
Cloning into '/var/lib/mock/f39-build-1439818-32287/root/chroot_tmpdir/scmroot/perl-Tree-R'...
$ git fetch origin d1bd30d1f1e119cc83154933a0efd03103e7c589:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Tree-R
 * [new ref]         d1bd30d1f1e119cc83154933a0efd03103e7c589 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1bd30d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild