$ git clone -n https://src.fedoraproject.org/rpms/kruler.git /var/lib/mock/f40-build-2253843-54221/root/chroot_tmpdir/scmroot/kruler
Cloning into '/var/lib/mock/f40-build-2253843-54221/root/chroot_tmpdir/scmroot/kruler'...
$ git fetch origin 346894b1b425b65a01efde2fa1cacd66f53f93c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kruler
 * [new ref]         346894b1b425b65a01efde2fa1cacd66f53f93c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 346894b 24.01.90