$ git clone -n https://src.fedoraproject.org/rpms/rust-wide.git /var/lib/mock/f45-build-46221-832/root/chroot_tmpdir/scmroot/rust-wide
Cloning into '/var/lib/mock/f45-build-46221-832/root/chroot_tmpdir/scmroot/rust-wide'...
$ git fetch origin 1fb6e7fb48c56605d8e4038fb37e43d2db180a05:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wide
 * [new ref]         1fb6e7fb48c56605d8e4038fb37e43d2db180a05 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1fb6e7f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild