$ git clone -n https://src.fedoraproject.org/rpms/jfsutils.git /var/lib/mock/f41-build-786007-13590/root/chroot_tmpdir/scmroot/jfsutils
Cloning into '/var/lib/mock/f41-build-786007-13590/root/chroot_tmpdir/scmroot/jfsutils'...
$ git fetch origin 997e3b92bc3f1a0af21088a1b838f33537cab5fc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jfsutils
 * [new ref]         997e3b92bc3f1a0af21088a1b838f33537cab5fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 997e3b9 Eliminate use of obsolete %patchN syntax (#2283636)