$ git clone -n https://src.fedoraproject.org/rpms/libformula.git /var/lib/mock/f41-build-1066277-19553/root/chroot_tmpdir/scmroot/libformula
Cloning into '/var/lib/mock/f41-build-1066277-19553/root/chroot_tmpdir/scmroot/libformula'...
$ git fetch origin 84f6c308118794163dbefd8d4ddba47e3577f964:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libformula
 * [new ref]         84f6c308118794163dbefd8d4ddba47e3577f964 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84f6c30 Eliminate use of obsolete %patchN syntax (#2283636)