$ git clone -n https://src.fedoraproject.org/rpms/bouncycastle.git /var/lib/mock/f40-build-2585882-62417/root/chroot_tmpdir/scmroot/bouncycastle
Cloning into '/var/lib/mock/f40-build-2585882-62417/root/chroot_tmpdir/scmroot/bouncycastle'...
$ git fetch origin ab48a609b5bc8093d1c1aaad583d2611200f5804:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bouncycastle
 * [new ref]         ab48a609b5bc8093d1c1aaad583d2611200f5804 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab48a60 Merge branch 'rawhide' into f40