$ git clone -n https://src.fedoraproject.org/rpms/memchan.git /var/lib/mock/f42-build-side-1-3523533-46210/root/chroot_tmpdir/scmroot/memchan
Cloning into '/var/lib/mock/f42-build-side-1-3523533-46210/root/chroot_tmpdir/scmroot/memchan'...
$ git fetch origin 7c5614652f368d3b2d10821ccc4eb5eebff364f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/memchan
 * [new ref]         7c5614652f368d3b2d10821ccc4eb5eebff364f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c56146 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild