$ git clone -n https://src.fedoraproject.org/rpms/libXdmcp.git /var/lib/mock/f40-build-785441-133953/root/chroot_tmpdir/scmroot/libXdmcp
Cloning into '/var/lib/mock/f40-build-785441-133953/root/chroot_tmpdir/scmroot/libXdmcp'...
$ git fetch origin 40dfa4ef033913002b3cc81dc6039d73080af8b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXdmcp
 * [new ref]         40dfa4ef033913002b3cc81dc6039d73080af8b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40dfa4e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild