$ git clone -n https://src.fedoraproject.org/rpms/kactivities.git /var/lib/mock/f40-build-2075897-49519/root/chroot_tmpdir/scmroot/kactivities
Cloning into '/var/lib/mock/f40-build-2075897-49519/root/chroot_tmpdir/scmroot/kactivities'...
$ git fetch origin e7fc4cf5ffc82d903e5be12075d049c1eb0cbd9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kactivities
 * [new ref]         e7fc4cf5ffc82d903e5be12075d049c1eb0cbd9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7fc4cf Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild