$ git clone -n https://src.fedoraproject.org/rpms/rust-const-cstr.git /var/lib/mock/f45-build-35425-695/root/chroot_tmpdir/scmroot/rust-const-cstr
Cloning into '/var/lib/mock/f45-build-35425-695/root/chroot_tmpdir/scmroot/rust-const-cstr'...
$ git fetch origin 4ae36e29262ea92bba1c2d3a0db3d2d1c5883135:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-const-cstr
 * [new ref]         4ae36e29262ea92bba1c2d3a0db3d2d1c5883135 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4ae36e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild