$ git clone -n https://src.fedoraproject.org/rpms/websocketpp.git /var/lib/mock/f45-build-38300-723/root/chroot_tmpdir/scmroot/websocketpp
Cloning into '/var/lib/mock/f45-build-38300-723/root/chroot_tmpdir/scmroot/websocketpp'...
$ git fetch origin 494d34987c79145e291e6be693f7d68e3d50d5cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/websocketpp
 * [new ref]         494d34987c79145e291e6be693f7d68e3d50d5cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 494d349 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild