$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-archive.git /var/lib/mock/f38-build-side-43-rust-devel-1422055-31465/root/chroot_tmpdir/scmroot/rust-gix-archive
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1422055-31465/root/chroot_tmpdir/scmroot/rust-gix-archive'...
$ git fetch origin cda9fa190cd040b9e153cede2a3d7b983ee904cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-archive
 * [new ref]         cda9fa190cd040b9e153cede2a3d7b983ee904cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cda9fa1 Update to version 0.6.0