$ git clone -n https://src.fedoraproject.org/rpms/gmsh.git /var/lib/mock/f40-build-774300-127655/root/chroot_tmpdir/scmroot/gmsh
Cloning into '/var/lib/mock/f40-build-774300-127655/root/chroot_tmpdir/scmroot/gmsh'...
$ git fetch origin 124e6660e8f607b804bf72530b99b29bdc0b1903:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gmsh
 * [new ref]         124e6660e8f607b804bf72530b99b29bdc0b1903 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 124e666 Update to 4.12.1