$ git clone -n https://src.fedoraproject.org/rpms/kruler.git /var/lib/mock/f40-build-1919859-25098/root/chroot_tmpdir/scmroot/kruler
Cloning into '/var/lib/mock/f40-build-1919859-25098/root/chroot_tmpdir/scmroot/kruler'...
$ git fetch origin 10fe36d7270db22c540943efd95791a3af3c1932:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kruler
 * [new ref]         10fe36d7270db22c540943efd95791a3af3c1932 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10fe36d Merge branch 'rawhide' into f40