$ git clone -n https://src.fedoraproject.org/rpms/rust-tiff.git /var/lib/mock/f45-build-45445-823/root/chroot_tmpdir/scmroot/rust-tiff
Cloning into '/var/lib/mock/f45-build-45445-823/root/chroot_tmpdir/scmroot/rust-tiff'...
$ git fetch origin 239c87be183d60d2de909ed5607d3f99219cccba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tiff
 * [new ref]         239c87be183d60d2de909ed5607d3f99219cccba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 239c87b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild