$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest.git /var/lib/mock/f41-build-815689-149688/root/chroot_tmpdir/scmroot/perl-Digest
Cloning into '/var/lib/mock/f41-build-815689-149688/root/chroot_tmpdir/scmroot/perl-Digest'...
$ git fetch origin 81e49f007313f71ad00154fda1c777e4e8b15305:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest
 * [new ref]         81e49f007313f71ad00154fda1c777e4e8b15305 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81e49f0 Increase release to favour standalone package