$ git clone -n https://src.fedoraproject.org/rpms/librsvg2.git /var/lib/mock/f41-build-853959-166804/root/chroot_tmpdir/scmroot/librsvg2
Cloning into '/var/lib/mock/f41-build-853959-166804/root/chroot_tmpdir/scmroot/librsvg2'...
$ git fetch origin d79136a1aac9a328d129d6dfcc18695a955279ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/librsvg2
 * [new ref]         d79136a1aac9a328d129d6dfcc18695a955279ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d79136a Bump nalgebra to 0.33, markup5ever to 0.14, xml5ever to 0.20