$ git clone -n https://src.fedoraproject.org/rpms/wcurl.git /var/lib/mock/f42-build-side-1-3583056-46887/root/chroot_tmpdir/scmroot/wcurl
Cloning into '/var/lib/mock/f42-build-side-1-3583056-46887/root/chroot_tmpdir/scmroot/wcurl'...
$ git fetch origin 640bff00ed04c2b8c7c86628f01bc09ac692306b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wcurl
 * [new ref]         640bff00ed04c2b8c7c86628f01bc09ac692306b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 640bff0 fix #2368673