$ git clone -n https://src.fedoraproject.org/rpms/hfsplus-tools.git /var/lib/mock/f41-build-1021577-18027/root/chroot_tmpdir/scmroot/hfsplus-tools
Cloning into '/var/lib/mock/f41-build-1021577-18027/root/chroot_tmpdir/scmroot/hfsplus-tools'...
$ git fetch origin 20f7930de4f96aa91ab8d35bf29e9ecc34520b53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hfsplus-tools
 * [new ref]         20f7930de4f96aa91ab8d35bf29e9ecc34520b53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20f7930 Eliminate use of obsolete %patchN syntax (#2283636)