$ git clone -n https://src.fedoraproject.org/rpms/replacer.git /var/lib/mock/f41-build-969539-17111/root/chroot_tmpdir/scmroot/replacer
Cloning into '/var/lib/mock/f41-build-969539-17111/root/chroot_tmpdir/scmroot/replacer'...
$ git fetch origin 4140dc242bbbf4026d84cb8a1562e8f1787506ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/replacer
 * [new ref]         4140dc242bbbf4026d84cb8a1562e8f1787506ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4140dc2 Eliminate use of obsolete %patchN syntax (#2283636)