$ git clone -n https://src.fedoraproject.org/rpms/R-msm.git /var/lib/mock/f40-build-2270179-54795/root/chroot_tmpdir/scmroot/R-msm
Cloning into '/var/lib/mock/f40-build-2270179-54795/root/chroot_tmpdir/scmroot/R-msm'...
$ git fetch origin 2efa78a3c6d60a0e7483f50ffab4a619e24c0778:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-msm
 * [new ref]         2efa78a3c6d60a0e7483f50ffab4a619e24c0778 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2efa78a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild