$ git clone -n https://src.fedoraproject.org/rpms/rust-data-encoding.git /var/lib/mock/f45-build-41244-780/root/chroot_tmpdir/scmroot/rust-data-encoding
Cloning into '/var/lib/mock/f45-build-41244-780/root/chroot_tmpdir/scmroot/rust-data-encoding'...
$ git fetch origin 02f3245258d26a0a6e8a6b14afdb723dc5d16da2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-data-encoding
 * [new ref]         02f3245258d26a0a6e8a6b14afdb723dc5d16da2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02f3245 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild