$ git clone -n https://src.fedoraproject.org/rpms/openjpeg.git /var/lib/mock/f41-build-1022697-18093/root/chroot_tmpdir/scmroot/openjpeg
Cloning into '/var/lib/mock/f41-build-1022697-18093/root/chroot_tmpdir/scmroot/openjpeg'...
$ git fetch origin f79cf4c868239ac22a5416537654aa35082c7ad2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openjpeg
 * [new ref]         f79cf4c868239ac22a5416537654aa35082c7ad2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f79cf4c Eliminate use of obsolete %patchN syntax (#2283636)