$ git clone -n https://src.fedoraproject.org/rpms/valgrind.git /var/lib/mock/f41-build-1033718-18591/root/chroot_tmpdir/scmroot/valgrind
Cloning into '/var/lib/mock/f41-build-1033718-18591/root/chroot_tmpdir/scmroot/valgrind'...
$ git fetch origin 15d202a6456e4c731389312a878bc913d1654f8d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/valgrind
 * [new ref]         15d202a6456e4c731389312a878bc913d1654f8d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15d202a 3.23.0-2 - Add upstream VALGRIND_3_23_BRANCH patches