$ git clone -n https://src.fedoraproject.org/rpms/rust-bugreport.git /var/lib/mock/f45-build-40594-773/root/chroot_tmpdir/scmroot/rust-bugreport
Cloning into '/var/lib/mock/f45-build-40594-773/root/chroot_tmpdir/scmroot/rust-bugreport'...
$ git fetch origin 06dff77beada30df0a12b9269ba69f3724a9381f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bugreport
 * [new ref]         06dff77beada30df0a12b9269ba69f3724a9381f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06dff77 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild