$ git clone -n https://src.fedoraproject.org/rpms/rust-cgroupfs.git /var/lib/mock/f38-build-side-42-init-devel-1396626-31051/root/chroot_tmpdir/scmroot/rust-cgroupfs
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396626-31051/root/chroot_tmpdir/scmroot/rust-cgroupfs'...
$ git fetch origin acbd0a4e059960113ec90a7330faec7cab2e2dc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cgroupfs
 * [new ref]         acbd0a4e059960113ec90a7330faec7cab2e2dc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at acbd0a4 Update to 0.7.1