$ git clone -n https://src.fedoraproject.org/rpms/sil-harmattan-fonts.git /var/lib/mock/f45-build-35971-700/root/chroot_tmpdir/scmroot/sil-harmattan-fonts
Cloning into '/var/lib/mock/f45-build-35971-700/root/chroot_tmpdir/scmroot/sil-harmattan-fonts'...
$ git fetch origin 7bc048c140ec0c302138f47c1ca1189b34be69a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sil-harmattan-fonts
 * [new ref]         7bc048c140ec0c302138f47c1ca1189b34be69a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bc048c Source url change