$ git clone -n https://src.fedoraproject.org/rpms/receptor.git /var/lib/mock/f40-build-2709607-71631/root/chroot_tmpdir/scmroot/receptor
Cloning into '/var/lib/mock/f40-build-2709607-71631/root/chroot_tmpdir/scmroot/receptor'...
$ git fetch origin 9d16ddbf0f8c21f91876e7dabab47209e328fa04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/receptor
 * [new ref]         9d16ddbf0f8c21f91876e7dabab47209e328fa04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d16ddb Update tests to fix broken tests