$ git clone -n https://src.fedoraproject.org/rpms/rust-tree_magic_db.git /var/lib/mock/f38-build-side-42-init-devel-1396077-31050/root/chroot_tmpdir/scmroot/rust-tree_magic_db
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396077-31050/root/chroot_tmpdir/scmroot/rust-tree_magic_db'...
$ git fetch origin d335e8f829c8a11b65fe14f2c7e8bdfab48acaf5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tree_magic_db
 * [new ref]         d335e8f829c8a11b65fe14f2c7e8bdfab48acaf5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d335e8f Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild