$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-dir.git /var/lib/mock/f41-build-side-1-2923816-34983/root/chroot_tmpdir/scmroot/rust-gix-dir
Cloning into '/var/lib/mock/f41-build-side-1-2923816-34983/root/chroot_tmpdir/scmroot/rust-gix-dir'...
$ git fetch origin f28df433c5cd59c0be650c9380c2b3ca2322dbe7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-dir
 * [new ref]         f28df433c5cd59c0be650c9380c2b3ca2322dbe7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f28df43 Update to version 0.8.0 (rhbz#2299569)