$ git clone -n https://src.fedoraproject.org/rpms/rust-gio0.20.git /var/lib/mock/f45-build-41861-786/root/chroot_tmpdir/scmroot/rust-gio0.20
Cloning into '/var/lib/mock/f45-build-41861-786/root/chroot_tmpdir/scmroot/rust-gio0.20'...
$ git fetch origin d38be88f6f59ed16d0f06ef85d2d15559d4d1d6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio0.20
 * [new ref]         d38be88f6f59ed16d0f06ef85d2d15559d4d1d6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d38be88 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild