$ git clone -n https://src.fedoraproject.org/rpms/rust-tree-sitter-language.git /var/lib/mock/f42-build-side-1-3511131-46047/root/chroot_tmpdir/scmroot/rust-tree-sitter-language
Cloning into '/var/lib/mock/f42-build-side-1-3511131-46047/root/chroot_tmpdir/scmroot/rust-tree-sitter-language'...
$ git fetch origin a2b7e4abb4f8cc6189c5973f4fc8fa449cc002f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tree-sitter-language
 * [new ref]         a2b7e4abb4f8cc6189c5973f4fc8fa449cc002f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2b7e4a Update to 0.1.5 (rhbz#2343310)