$ git clone -n https://src.fedoraproject.org/rpms/bcache-tools.git /var/lib/mock/f41-build-830347-14801/root/chroot_tmpdir/scmroot/bcache-tools
Cloning into '/var/lib/mock/f41-build-830347-14801/root/chroot_tmpdir/scmroot/bcache-tools'...
$ git fetch origin 1608995b5cab6c9d235c8cd0963a000b87a83836:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcache-tools
 * [new ref]         1608995b5cab6c9d235c8cd0963a000b87a83836 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1608995 Eliminate use of obsolete %patchN syntax (#2283636)