$ git clone -n https://src.fedoraproject.org/rpms/dolfin.git /var/lib/mock/f41-build-3152127-40629/root/chroot_tmpdir/scmroot/dolfin
Cloning into '/var/lib/mock/f41-build-3152127-40629/root/chroot_tmpdir/scmroot/dolfin'...
$ git fetch origin 42358678d6b2f14c3ad48b8a14db83f370645453:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dolfin
 * [new ref]         42358678d6b2f14c3ad48b8a14db83f370645453 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4235867 Add missing runtime dependency