$ git clone -n https://src.fedoraproject.org/rpms/gecode.git /var/lib/mock/f40-build-1997431-44134/root/chroot_tmpdir/scmroot/gecode
Cloning into '/var/lib/mock/f40-build-1997431-44134/root/chroot_tmpdir/scmroot/gecode'...
$ git fetch origin 38ca865c5854fc01064ad87626bd6bf105eab92c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gecode
 * [new ref]         38ca865c5854fc01064ad87626bd6bf105eab92c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38ca865 Added patch to significantly cut down deprecation warnings. Patch was cherry-picked from upstream's unreleased "develop" branch