$ git clone -n https://src.fedoraproject.org/rpms/fielding.git /var/lib/mock/f42-build-side-1-3502126-45977/root/chroot_tmpdir/scmroot/fielding
Cloning into '/var/lib/mock/f42-build-side-1-3502126-45977/root/chroot_tmpdir/scmroot/fielding'...
$ git fetch origin df1805d268904f43b1e0052a391cfaf9df2e683c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fielding
 * [new ref]         df1805d268904f43b1e0052a391cfaf9df2e683c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df1805d Rebuild (qt6)