$ git clone -n https://src.fedoraproject.org/rpms/NetworkManager.git /var/lib/mock/f42-build-863098-171404/root/chroot_tmpdir/scmroot/NetworkManager
Cloning into '/var/lib/mock/f42-build-863098-171404/root/chroot_tmpdir/scmroot/NetworkManager'...
$ git fetch origin ae2657dae420c5a98c577d1fe7fb2028dd25a5e4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/NetworkManager
 * [new ref]         ae2657dae420c5a98c577d1fe7fb2028dd25a5e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ae2657d Rebuild for ppp 2.5.1 again on a side tag, ugh