$ git clone -n https://src.fedoraproject.org/rpms/rust-wayland-scanner.git /var/lib/mock/f45-build-46145-831/root/chroot_tmpdir/scmroot/rust-wayland-scanner
Cloning into '/var/lib/mock/f45-build-46145-831/root/chroot_tmpdir/scmroot/rust-wayland-scanner'...
$ git fetch origin 500e8ac712a5bece1a4a521da6a25285573938b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wayland-scanner
 * [new ref]         500e8ac712a5bece1a4a521da6a25285573938b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 500e8ac Update to version 0.31.11; Fixes RHBZ#2506296