$ git clone -n https://src.fedoraproject.org/rpms/python-pikepdf.git /var/lib/mock/f40-build-752699-116820/root/chroot_tmpdir/scmroot/python-pikepdf
Cloning into '/var/lib/mock/f40-build-752699-116820/root/chroot_tmpdir/scmroot/python-pikepdf'...
$ git fetch origin bc419830b549e1c21b9d4649614f786866d9e99f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-pikepdf
 * [new ref]         bc419830b549e1c21b9d4649614f786866d9e99f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc41983 Update to latest version (#2247206)