$ git clone -n https://src.fedoraproject.org/rpms/rust-bindgen0.63.git /var/lib/mock/f38-build-side-43-rust-devel-1420344-31461/root/chroot_tmpdir/scmroot/rust-bindgen0.63
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1420344-31461/root/chroot_tmpdir/scmroot/rust-bindgen0.63'...
$ git fetch origin 2ebcef6618fd4cb6705717608ace573d98a31fe1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bindgen0.63
 * [new ref]         2ebcef6618fd4cb6705717608ace573d98a31fe1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ebcef6 Initial import (bindgen 0.63 compat package)