$ git clone -n https://src.fedoraproject.org/rpms/rust-universal-hash.git /var/lib/mock/f45-build-45954-829/root/chroot_tmpdir/scmroot/rust-universal-hash
Cloning into '/var/lib/mock/f45-build-45954-829/root/chroot_tmpdir/scmroot/rust-universal-hash'...
$ git fetch origin 8765f1fa7ded8c5bf61a81d95f55bc35f1555233:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-universal-hash
 * [new ref]         8765f1fa7ded8c5bf61a81d95f55bc35f1555233 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8765f1f Update to version 0.6.1; Fixes RHBZ#2443355