$ git clone -n https://src.fedoraproject.org/rpms/rust-utf8-width.git /var/lib/mock/f45-build-46036-830/root/chroot_tmpdir/scmroot/rust-utf8-width
Cloning into '/var/lib/mock/f45-build-46036-830/root/chroot_tmpdir/scmroot/rust-utf8-width'...
$ git fetch origin 27dec950615211bba0eaad22415aa813ab3ba993:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-utf8-width
 * [new ref]         27dec950615211bba0eaad22415aa813ab3ba993 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27dec95 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild