$ git clone -n https://src.fedoraproject.org/rpms/kf5-messagelib.git /var/lib/mock/f42-build-3426286-45168/root/chroot_tmpdir/scmroot/kf5-messagelib
Cloning into '/var/lib/mock/f42-build-3426286-45168/root/chroot_tmpdir/scmroot/kf5-messagelib'...
$ git fetch origin 2b1f4c2dae08a0d3038145a071cdc6791f909eaa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-messagelib
 * [new ref]         2b1f4c2dae08a0d3038145a071cdc6791f909eaa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b1f4c2 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild