$ git clone -n https://src.fedoraproject.org/rpms/gromacs.git /var/lib/mock/f39-build-2370553-60389/root/chroot_tmpdir/scmroot/gromacs
Cloning into '/var/lib/mock/f39-build-2370553-60389/root/chroot_tmpdir/scmroot/gromacs'...
$ git fetch origin c78d91a6d9bf48f4c1563c35563d3dfa4469a5ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gromacs
 * [new ref]         c78d91a6d9bf48f4c1563c35563d3dfa4469a5ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c78d91a Version bump to v2023.4 (bug#2260114)