$ git clone -n https://src.fedoraproject.org/rpms/ctk.git /var/lib/mock/f45-build-5463-339/root/chroot_tmpdir/scmroot/ctk
Cloning into '/var/lib/mock/f45-build-5463-339/root/chroot_tmpdir/scmroot/ctk'...
$ git fetch origin 582ca0abd673f1b87966b8b7ced2062a69d849d4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ctk
 * [new ref]         582ca0abd673f1b87966b8b7ced2062a69d849d4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 582ca0a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild