$ git clone -n https://src.fedoraproject.org/rpms/golang-github-google-btree.git /var/lib/mock/f40-build-2000563-44480/root/chroot_tmpdir/scmroot/golang-github-google-btree
Cloning into '/var/lib/mock/f40-build-2000563-44480/root/chroot_tmpdir/scmroot/golang-github-google-btree'...
$ git fetch origin cada02f96ef7fa44e897cada9402ffe1ed4a6934:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-google-btree
 * [new ref]         cada02f96ef7fa44e897cada9402ffe1ed4a6934 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cada02f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild