$ git clone -n https://src.fedoraproject.org/rpms/krita.git /var/lib/mock/f42-build-3409140-45146/root/chroot_tmpdir/scmroot/krita
Cloning into '/var/lib/mock/f42-build-3409140-45146/root/chroot_tmpdir/scmroot/krita'...
$ git fetch origin 7eac31d6fbef8481a3b2c8db5e465fb85e82adf0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/krita
 * [new ref]         7eac31d6fbef8481a3b2c8db5e465fb85e82adf0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7eac31d Rebuild (again) for gsl 2.8