$ git clone -n https://src.fedoraproject.org/rpms/pcb.git /var/lib/mock/f41-build-side-1-2650502-27597/root/chroot_tmpdir/scmroot/pcb
Cloning into '/var/lib/mock/f41-build-side-1-2650502-27597/root/chroot_tmpdir/scmroot/pcb'...
$ git fetch origin d7bfba2e105977f38a72232c79c8388698c0e782:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pcb
 * [new ref]         d7bfba2e105977f38a72232c79c8388698c0e782 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7bfba2 convert GPLv2+ license to SPDX