$ git clone -n https://src.fedoraproject.org/rpms/tmpwatch.git /var/lib/mock/f42-build-side-1-3585731-46907/root/chroot_tmpdir/scmroot/tmpwatch
Cloning into '/var/lib/mock/f42-build-side-1-3585731-46907/root/chroot_tmpdir/scmroot/tmpwatch'...
$ git fetch origin 8a6ec4a324b9347c5db1dcd4fc4e4c03524b6cba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tmpwatch
 * [new ref]         8a6ec4a324b9347c5db1dcd4fc4e4c03524b6cba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a6ec4a Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild