$ git clone -n https://src.fedoraproject.org/rpms/rust-clru.git /var/lib/mock/f39-build-1509828-35454/root/chroot_tmpdir/scmroot/rust-clru
Cloning into '/var/lib/mock/f39-build-1509828-35454/root/chroot_tmpdir/scmroot/rust-clru'...
$ git fetch origin 500be8b5cfbe484c3a5cc39be47100956e555f6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-clru
 * [new ref]         500be8b5cfbe484c3a5cc39be47100956e555f6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 500be8b Initial package (rhbz#2241010)