$ git clone -n https://src.fedoraproject.org/rpms/weldr-client.git /var/lib/mock/f45-build-38325-723/root/chroot_tmpdir/scmroot/weldr-client
Cloning into '/var/lib/mock/f45-build-38325-723/root/chroot_tmpdir/scmroot/weldr-client'...
$ git fetch origin 75b698d9c35284fa6aee70ee8d4837d03b02064a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/weldr-client
 * [new ref]         75b698d9c35284fa6aee70ee8d4837d03b02064a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75b698d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild