$ git clone -n https://src.fedoraproject.org/rpms/rust-lru.git /var/lib/mock/f40-build-2205680-52024/root/chroot_tmpdir/scmroot/rust-lru
Cloning into '/var/lib/mock/f40-build-2205680-52024/root/chroot_tmpdir/scmroot/rust-lru'...
$ git fetch origin fc0d631315364bcf2704246d548804ffbadbe9d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-lru
 * [new ref]         fc0d631315364bcf2704246d548804ffbadbe9d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc0d631 Update to 0.12.1