$ git clone -n https://src.fedoraproject.org/rpms/filebench.git /var/lib/mock/f41-build-1020736-18018/root/chroot_tmpdir/scmroot/filebench
Cloning into '/var/lib/mock/f41-build-1020736-18018/root/chroot_tmpdir/scmroot/filebench'...
$ git fetch origin 755312b3f7e285916af8e7536c1397a2233a6603:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/filebench
 * [new ref]         755312b3f7e285916af8e7536c1397a2233a6603 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 755312b Eliminate use of obsolete %patchN syntax (#2283636)