$ git clone -n https://src.fedoraproject.org/rpms/libspf2.git /var/lib/mock/f45-build-17027-495/root/chroot_tmpdir/scmroot/libspf2
Cloning into '/var/lib/mock/f45-build-17027-495/root/chroot_tmpdir/scmroot/libspf2'...
$ git fetch origin 994e2fb516aad7c2f3936d2bd97e8539b5712ea8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libspf2
 * [new ref]         994e2fb516aad7c2f3936d2bd97e8539b5712ea8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 994e2fb Perl 5.44 rebuild