$ git clone -n https://src.fedoraproject.org/rpms/R-rematch2.git /var/lib/mock/f40-build-2175437-51067/root/chroot_tmpdir/scmroot/R-rematch2
Cloning into '/var/lib/mock/f40-build-2175437-51067/root/chroot_tmpdir/scmroot/R-rematch2'...
$ git fetch origin ea986f4abc432e510685e30c0c62160b6459073e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rematch2
 * [new ref]         ea986f4abc432e510685e30c0c62160b6459073e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea986f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild