$ git clone -n https://src.fedoraproject.org/rpms/jboss-jaxrs-2.0-api.git /var/lib/mock/f41-build-1228411-22831/root/chroot_tmpdir/scmroot/jboss-jaxrs-2.0-api
Cloning into '/var/lib/mock/f41-build-1228411-22831/root/chroot_tmpdir/scmroot/jboss-jaxrs-2.0-api'...
$ git fetch origin 7fd33d7ae038d50f79a1306c9e9fae7de1202833:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jboss-jaxrs-2.0-api
 * [new ref]         7fd33d7ae038d50f79a1306c9e9fae7de1202833 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fd33d7 Eliminate use of obsolete %patchN syntax (#2283636)