$ git clone -n https://src.fedoraproject.org/rpms/rust-os_type.git /var/lib/mock/f40-build-2682169-67963/root/chroot_tmpdir/scmroot/rust-os_type
Cloning into '/var/lib/mock/f40-build-2682169-67963/root/chroot_tmpdir/scmroot/rust-os_type'...
$ git fetch origin 9981d036b9e582e6ee8338cabbc6aaec132b0756:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-os_type
 * [new ref]         9981d036b9e582e6ee8338cabbc6aaec132b0756 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9981d03 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild