$ git clone -n https://src.fedoraproject.org/rpms/sad.git /var/lib/mock/f40-build-769586-125726/root/chroot_tmpdir/scmroot/sad
Cloning into '/var/lib/mock/f40-build-769586-125726/root/chroot_tmpdir/scmroot/sad'...
$ git fetch origin a7ac3f7084d8977b511d77ebc5f22e6b286e7f52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sad
 * [new ref]         a7ac3f7084d8977b511d77ebc5f22e6b286e7f52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7ac3f7 import rhbz#2247538