$ git clone -n https://src.fedoraproject.org/rpms/rust-gix.git /var/lib/mock/f41-build-side-1-2923817-34983/root/chroot_tmpdir/scmroot/rust-gix
Cloning into '/var/lib/mock/f41-build-side-1-2923817-34983/root/chroot_tmpdir/scmroot/rust-gix'...
$ git fetch origin 71d7ca7ae0a9d61e2d62da7a70c001ae6dd1c27f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix
 * [new ref]         71d7ca7ae0a9d61e2d62da7a70c001ae6dd1c27f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 71d7ca7 Update to version 0.66.0 (rhbz#2299560)