$ git clone -n https://src.fedoraproject.org/rpms/lxde-common.git /var/lib/mock/f45-build-17790-504/root/chroot_tmpdir/scmroot/lxde-common
Cloning into '/var/lib/mock/f45-build-17790-504/root/chroot_tmpdir/scmroot/lxde-common'...
$ git fetch origin 3a84636d2bf0c3fe13c29b60e7506e352c152ddc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxde-common
 * [new ref]         3a84636d2bf0c3fe13c29b60e7506e352c152ddc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a84636 0.99.4