$ git clone -n https://src.fedoraproject.org/rpms/rust-fixed.git /var/lib/mock/f40-build-2232163-53326/root/chroot_tmpdir/scmroot/rust-fixed
Cloning into '/var/lib/mock/f40-build-2232163-53326/root/chroot_tmpdir/scmroot/rust-fixed'...
$ git fetch origin 28f4566a04ff7849cd45f3c6f4241dcf99e7ab38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fixed
 * [new ref]         28f4566a04ff7849cd45f3c6f4241dcf99e7ab38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28f4566 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild