$ git clone -n https://src.fedoraproject.org/rpms/gmediarender.git /var/lib/mock/f40-build-1926222-25107/root/chroot_tmpdir/scmroot/gmediarender
Cloning into '/var/lib/mock/f40-build-1926222-25107/root/chroot_tmpdir/scmroot/gmediarender'...
$ git fetch origin 156506aeb0d894c9bf92385912f3abdc74b9db4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gmediarender
 * [new ref]         156506aeb0d894c9bf92385912f3abdc74b9db4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 156506a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild