$ git clone -n https://src.fedoraproject.org/rpms/exercism.git /var/lib/mock/f41-build-side-1-2750154-31029/root/chroot_tmpdir/scmroot/exercism
Cloning into '/var/lib/mock/f41-build-side-1-2750154-31029/root/chroot_tmpdir/scmroot/exercism'...
$ git fetch origin fb49907c66b6bf5483db65cbb7b2f90f285fced9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exercism
 * [new ref]         fb49907c66b6bf5483db65cbb7b2f90f285fced9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb49907 Update to latest version (#2309045)