$ git clone -n https://src.fedoraproject.org/rpms/libgexiv2_0.14.git /var/lib/mock/f45-build-16258-484/root/chroot_tmpdir/scmroot/libgexiv2_0.14
Cloning into '/var/lib/mock/f45-build-16258-484/root/chroot_tmpdir/scmroot/libgexiv2_0.14'...
$ git fetch origin bf6ddcf554b8e2ab7757c23d23d230e2ffeedb7f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgexiv2_0.14
 * [new ref]         bf6ddcf554b8e2ab7757c23d23d230e2ffeedb7f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf6ddcf Update to 0.14.7