$ git clone -n https://src.fedoraproject.org/rpms/facebook-time.git /var/lib/mock/f45-build-8633-392/root/chroot_tmpdir/scmroot/facebook-time
Cloning into '/var/lib/mock/f45-build-8633-392/root/chroot_tmpdir/scmroot/facebook-time'...
$ git fetch origin 0bc2a6c7679d63fb6ee16ef0a5087dcb5246c452:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/facebook-time
 * [new ref]         0bc2a6c7679d63fb6ee16ef0a5087dcb5246c452 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0bc2a6c Add sa53 subpackage