$ git clone -n https://src.fedoraproject.org/rpms/rust-bytemuck.git /var/lib/mock/f40-build-2053839-49096/root/chroot_tmpdir/scmroot/rust-bytemuck
Cloning into '/var/lib/mock/f40-build-2053839-49096/root/chroot_tmpdir/scmroot/rust-bytemuck'...
$ git fetch origin e25a83f533e53218fc3e8cd99cf9785699f24a19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bytemuck
 * [new ref]         e25a83f533e53218fc3e8cd99cf9785699f24a19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e25a83f Update to version 1.14.0; Fixes RHBZ#2237538