$ git clone -n https://src.fedoraproject.org/rpms/gnujump.git /var/lib/mock/f41-build-696637-12816/root/chroot_tmpdir/scmroot/gnujump
Cloning into '/var/lib/mock/f41-build-696637-12816/root/chroot_tmpdir/scmroot/gnujump'...
$ git fetch origin 0cadee5f42fce13f9f94bf04730981e115f5af87:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnujump
 * [new ref]         0cadee5f42fce13f9f94bf04730981e115f5af87 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0cadee5 Eliminate use of obsolete %patchN syntax (#2283636)