$ git clone -n https://src.fedoraproject.org/rpms/ghc-crypton-x509-validation.git /var/lib/mock/f41-build-840169-160595/root/chroot_tmpdir/scmroot/ghc-crypton-x509-validation
Cloning into '/var/lib/mock/f41-build-840169-160595/root/chroot_tmpdir/scmroot/ghc-crypton-x509-validation'...
$ git fetch origin f61405f7c100188421644b2e679869681e81ee16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-crypton-x509-validation
 * [new ref]         f61405f7c100188421644b2e679869681e81ee16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f61405f import rhbz#2300441