$ git clone -n https://src.fedoraproject.org/rpms/rust-float-cmp.git /var/lib/mock/f45-build-41704-785/root/chroot_tmpdir/scmroot/rust-float-cmp
Cloning into '/var/lib/mock/f45-build-41704-785/root/chroot_tmpdir/scmroot/rust-float-cmp'...
$ git fetch origin e65766ca515dbaa680ada63a545633912595bfc8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-float-cmp
 * [new ref]         e65766ca515dbaa680ada63a545633912595bfc8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e65766c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild