$ git clone -n https://src.fedoraproject.org/rpms/rust-codepage.git /var/lib/mock/f45-build-40854-776/root/chroot_tmpdir/scmroot/rust-codepage
Cloning into '/var/lib/mock/f45-build-40854-776/root/chroot_tmpdir/scmroot/rust-codepage'...
$ git fetch origin da205b09f1872b23a9ad238ecd9c80facfec82d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-codepage
 * [new ref]         da205b09f1872b23a9ad238ecd9c80facfec82d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da205b0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild