$ git clone -n https://src.fedoraproject.org/rpms/systemd-bootchart.git /var/lib/mock/f41-build-860807-169209/root/chroot_tmpdir/scmroot/systemd-bootchart
Cloning into '/var/lib/mock/f41-build-860807-169209/root/chroot_tmpdir/scmroot/systemd-bootchart'...
$ git fetch origin b1c565f5e58527db3fc7f8b74bf4922a744042ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/systemd-bootchart
 * [new ref]         b1c565f5e58527db3fc7f8b74bf4922a744042ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1c565f Merge #2 `Update to v235`