$ git clone -n https://src.fedoraproject.org/rpms/rust-bit_field.git /var/lib/mock/f39-build-1525044-36037/root/chroot_tmpdir/scmroot/rust-bit_field
Cloning into '/var/lib/mock/f39-build-1525044-36037/root/chroot_tmpdir/scmroot/rust-bit_field'...
$ git fetch origin 4b08baecaaaad396ad24c7a169700d7da3e6295e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bit_field
 * [new ref]         4b08baecaaaad396ad24c7a169700d7da3e6295e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b08bae Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild