$ git clone -n https://src.fedoraproject.org/rpms/sevmgr.git /var/lib/mock/f42-build-3402162-45132/root/chroot_tmpdir/scmroot/sevmgr
Cloning into '/var/lib/mock/f42-build-3402162-45132/root/chroot_tmpdir/scmroot/sevmgr'...
$ git fetch origin aa6bf31e87334f06693e85a12f04eb0dcbf731e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sevmgr
 * [new ref]         aa6bf31e87334f06693e85a12f04eb0dcbf731e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa6bf31 Upstream update