$ git clone -n https://src.fedoraproject.org/rpms/perl-CDDB_get.git /var/lib/mock/f41-build-787195-13594/root/chroot_tmpdir/scmroot/perl-CDDB_get
Cloning into '/var/lib/mock/f41-build-787195-13594/root/chroot_tmpdir/scmroot/perl-CDDB_get'...
$ git fetch origin 702b751faa79d683dd6b95650bd26a2e40e3a98d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-CDDB_get
 * [new ref]         702b751faa79d683dd6b95650bd26a2e40e3a98d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 702b751 Eliminate use of obsolete %patchN syntax (#2283636)