$ git clone -n https://src.fedoraproject.org/rpms/ser2net.git /var/lib/mock/f45-build-35784-699/root/chroot_tmpdir/scmroot/ser2net
Cloning into '/var/lib/mock/f45-build-35784-699/root/chroot_tmpdir/scmroot/ser2net'...
$ git fetch origin 566c3b594a51a92c0bca41ae99b319f6fbe85df4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ser2net
 * [new ref]         566c3b594a51a92c0bca41ae99b319f6fbe85df4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 566c3b5 Update to 4.6.8