$ git clone -n https://src.fedoraproject.org/rpms/rust-chumsky.git /var/lib/mock/f45-build-40779-776/root/chroot_tmpdir/scmroot/rust-chumsky
Cloning into '/var/lib/mock/f45-build-40779-776/root/chroot_tmpdir/scmroot/rust-chumsky'...
$ git fetch origin 63a2a3810c3237a9f9d39d54dbc3d1b7cfcdf0e1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-chumsky
 * [new ref]         63a2a3810c3237a9f9d39d54dbc3d1b7cfcdf0e1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 63a2a38 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild