$ git clone -n https://src.fedoraproject.org/rpms/flare-im.git /var/lib/mock/f45-build-9023-397/root/chroot_tmpdir/scmroot/flare-im
Cloning into '/var/lib/mock/f45-build-9023-397/root/chroot_tmpdir/scmroot/flare-im'...
$ git fetch origin 01d42e7da7af614f2a554187290a3f373adf5423:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flare-im
 * [new ref]         01d42e7da7af614f2a554187290a3f373adf5423 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01d42e7 update to 0.22.2 (resolves rhbz#2524587)