$ git clone -n https://src.fedoraproject.org/rpms/sysprof.git /var/lib/mock/f40-build-2646125-66607/root/chroot_tmpdir/scmroot/sysprof
Cloning into '/var/lib/mock/f40-build-2646125-66607/root/chroot_tmpdir/scmroot/sysprof'...
$ git fetch origin 5e94f5a2ee9dedc1aa9d3590b5211627fb40858a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sysprof
 * [new ref]         5e94f5a2ee9dedc1aa9d3590b5211627fb40858a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e94f5a Update to 46.0