$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-pack.git /var/lib/mock/f40-build-2723328-73099/root/chroot_tmpdir/scmroot/rust-gix-pack
Cloning into '/var/lib/mock/f40-build-2723328-73099/root/chroot_tmpdir/scmroot/rust-gix-pack'...
$ git fetch origin 364639bca31e046059ee97c3be5ac35889c5ac61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-pack
 * [new ref]         364639bca31e046059ee97c3be5ac35889c5ac61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 364639b Update to version 0.49.0 (rhbz#2253270)