$ git clone -n https://src.fedoraproject.org/rpms/rust-half.git /var/lib/mock/f45-build-42251-791/root/chroot_tmpdir/scmroot/rust-half
Cloning into '/var/lib/mock/f45-build-42251-791/root/chroot_tmpdir/scmroot/rust-half'...
$ git fetch origin d0d578af6137db56d9e80de8f4d96a9857628108:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-half
 * [new ref]         d0d578af6137db56d9e80de8f4d96a9857628108 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0d578a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild