$ git clone -n https://src.fedoraproject.org/rpms/chayang.git /var/lib/mock/f45-build-5538-340/root/chroot_tmpdir/scmroot/chayang
Cloning into '/var/lib/mock/f45-build-5538-340/root/chroot_tmpdir/scmroot/chayang'...
$ git fetch origin f8a4168ead6abaa018145b88ca1b26d5f64bd690:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chayang
 * [new ref]         f8a4168ead6abaa018145b88ca1b26d5f64bd690 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f8a4168 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild