$ git clone -n https://src.fedoraproject.org/rpms/golang-github-ghemawat-stream.git /var/lib/mock/f40-build-2667679-67165/root/chroot_tmpdir/scmroot/golang-github-ghemawat-stream
Cloning into '/var/lib/mock/f40-build-2667679-67165/root/chroot_tmpdir/scmroot/golang-github-ghemawat-stream'...
$ git fetch origin 63b90a0f36fd7a433790a26c76e7c8871f50dfce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-ghemawat-stream
 * [new ref]         63b90a0f36fd7a433790a26c76e7c8871f50dfce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63b90a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild