$ git clone -n https://src.fedoraproject.org/rpms/rust-universal-hash0.5.git /var/lib/mock/f45-build-45948-829/root/chroot_tmpdir/scmroot/rust-universal-hash0.5
Cloning into '/var/lib/mock/f45-build-45948-829/root/chroot_tmpdir/scmroot/rust-universal-hash0.5'...
$ git fetch origin c6e8fc1a46c9fa4833825fe3bdb33a88050abf5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-universal-hash0.5
 * [new ref]         c6e8fc1a46c9fa4833825fe3bdb33a88050abf5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6e8fc1 Initial compat package