$ git clone -n https://src.fedoraproject.org/rpms/libkate.git /var/lib/mock/f45-build-16438-486/root/chroot_tmpdir/scmroot/libkate
Cloning into '/var/lib/mock/f45-build-16438-486/root/chroot_tmpdir/scmroot/libkate'...
$ git fetch origin b6a5bba5546fc7163fd85ad5ddc6ad8f55d0609e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkate
 * [new ref]         b6a5bba5546fc7163fd85ad5ddc6ad8f55d0609e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6a5bba Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild