$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest.git /var/lib/mock/f43-perl-60945640-6586562/root/chroot_tmpdir/scmroot/perl-Digest
Cloning into '/var/lib/mock/f43-perl-60945640-6586562/root/chroot_tmpdir/scmroot/perl-Digest'...
$ git fetch origin 4eebc3b3b6236eea29839212a89d10ce855266df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest
 * [new ref]         4eebc3b3b6236eea29839212a89d10ce855266df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4eebc3b Increase release to favour standalone package