$ git clone -n https://src.fedoraproject.org/rpms/pcp.git /var/lib/mock/f42-build-59220950-6572000/root/chroot_tmpdir/scmroot/pcp
Cloning into '/var/lib/mock/f42-build-59220950-6572000/root/chroot_tmpdir/scmroot/pcp'...
$ git fetch origin b18d8d7b15eea5471716fbaa2bef4b8e612aca67:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pcp
 * [new ref]         b18d8d7b15eea5471716fbaa2bef4b8e612aca67 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b18d8d7 Backport metric removal for pmdaopenmetrics