$ git clone -n https://src.fedoraproject.org/rpms/zycore-c.git /var/lib/mock/f40-build-798251-141768/root/chroot_tmpdir/scmroot/zycore-c
Cloning into '/var/lib/mock/f40-build-798251-141768/root/chroot_tmpdir/scmroot/zycore-c'...
$ git fetch origin 0ba50fb4462859a8fcdf6bea6eaf6e9ff16718d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zycore-c
 * [new ref]         0ba50fb4462859a8fcdf6bea6eaf6e9ff16718d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ba50fb update to 1.5.0