$ git clone -n https://src.fedoraproject.org/rpms/google-auth-httplib2.git /var/lib/mock/f39-build-1637246-39979/root/chroot_tmpdir/scmroot/google-auth-httplib2
Cloning into '/var/lib/mock/f39-build-1637246-39979/root/chroot_tmpdir/scmroot/google-auth-httplib2'...
$ git fetch origin 55dc83ea032b7b4dd5d95e54568ac8ad45f9d7a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-auth-httplib2
 * [new ref]         55dc83ea032b7b4dd5d95e54568ac8ad45f9d7a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55dc83e 0.1.1