$ git clone -n https://src.fedoraproject.org/rpms/nex.git /var/lib/mock/f40-build-795840-140332/root/chroot_tmpdir/scmroot/nex
Cloning into '/var/lib/mock/f40-build-795840-140332/root/chroot_tmpdir/scmroot/nex'...
$ git fetch origin b5f622e952ddbb6b58832cad75a661babb47a15d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nex
 * [new ref]         b5f622e952ddbb6b58832cad75a661babb47a15d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5f622e Rebuild for golang 1.22.0