$ git clone -n https://src.fedoraproject.org/rpms/systemd.git /var/lib/mock/f41-build-1041890-18994/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/f41-build-1041890-18994/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin ebf352d292924fd989d81e8ca572a70cffeb1b4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/systemd
 * [new ref]         ebf352d292924fd989d81e8ca572a70cffeb1b4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebf352d disable auto-features when bootstrapping