$ git clone -n https://src.fedoraproject.org/rpms/memchan.git /var/lib/mock/f40-build-757920-119573/root/chroot_tmpdir/scmroot/memchan
Cloning into '/var/lib/mock/f40-build-757920-119573/root/chroot_tmpdir/scmroot/memchan'...
$ git fetch origin 1ff45c05133bf2702f073b307f0fc68bc3566d74:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/memchan
 * [new ref]         1ff45c05133bf2702f073b307f0fc68bc3566d74 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ff45c0 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild