$ git clone -n https://src.fedoraproject.org/rpms/chromium.git /var/lib/mock/f41-build-711133-13023/root/chroot_tmpdir/scmroot/chromium
Cloning into '/var/lib/mock/f41-build-711133-13023/root/chroot_tmpdir/scmroot/chromium'...
$ git fetch origin 92a731d246a9039b4cf95f7e1a93343d9e57a679:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chromium
 * [new ref]         92a731d246a9039b4cf95f7e1a93343d9e57a679 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92a731d enable system libicu for fedora