$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-diff.git /var/lib/mock/f41-build-side-1-3006131-36735/root/chroot_tmpdir/scmroot/rust-gix-diff
Cloning into '/var/lib/mock/f41-build-side-1-3006131-36735/root/chroot_tmpdir/scmroot/rust-gix-diff'...
$ git fetch origin 658f4e321b69bb54db4efd0a39b4de9c3538d383:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-diff
 * [new ref]         658f4e321b69bb54db4efd0a39b4de9c3538d383 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 658f4e3 Update to version 0.46.0 (rhbz#2307381)