$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-ref.git /var/lib/mock/f41-build-side-1-2923820-34983/root/chroot_tmpdir/scmroot/rust-gix-ref
Cloning into '/var/lib/mock/f41-build-side-1-2923820-34983/root/chroot_tmpdir/scmroot/rust-gix-ref'...
$ git fetch origin 311160d93f616aa3e9b7cc1b151ece84b3d7488d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-ref
 * [new ref]         311160d93f616aa3e9b7cc1b151ece84b3d7488d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 311160d Update to version 0.47.0 (rhbz#2299584)