$ git clone -n https://src.fedoraproject.org/rpms/rpmreaper.git /var/lib/mock/f41-build-700926-12894/root/chroot_tmpdir/scmroot/rpmreaper
Cloning into '/var/lib/mock/f41-build-700926-12894/root/chroot_tmpdir/scmroot/rpmreaper'...
$ git fetch origin d0dff7aa40b1a870372a3159e33fbedb9890cf32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpmreaper
 * [new ref]         d0dff7aa40b1a870372a3159e33fbedb9890cf32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0dff7a Eliminate use of obsolete %patchN syntax (#2283636)